Most Helpful Guy
Well you're a full grown woman, so obviously "do whatever daddy tells you" is not the answer.
If the problem is just his job, tell your dad you don't care and that's the last you ever want to hear of it or you'll choose your boyfriend over him. Tell him he's ruining both relationships, this is the final word on the subject, and if he tries to undermine your romantic life again you'll end your father-daughter relationship.
That'll light a fire under his ass and set him on track for the future ;)
Most Helpful Girl
You simply tell him that this is your life and he needs to step aside and allow you to make your own choices. He isn't the one dating your boyfriend. Therefor, he needs to back up and take a chill pill. He might not like it but he will have to deal with it.